"The world has lost a consummate actor today and I have lost a cherished friend," Andrews said in a statement on Friday. "I treasure the memories of our work together and all the humour and fun we shared through the years."

Plummer died peacefully at his home in Connecticut with his wife Elaine Taylor at his side.

"Chris was an extraordinary man who deeply loved and respected his profession with great old fashion manners, self deprecating humour and the music of words," his longtime friend and manager Lou Pitt said.

Plummer, an accomplished Shakespearean actor honoured for his varied stage, television and film work in a career that spanned more than six decades, was best known for his role in The Sound of Music, which at the time eclipsed Gone With the Wind (1939) as the top-earning movie ever.

Plummer flourished in a succession of meaty roles after age 70 - a time in life when most actors merely fade away. At age 82, he became the oldest actor to get a competitive Oscar when he won for his supporting role in Beginners as an elderly man who comes out of the closet as gay.

"You're only two years older than me, darling," Plummer, who was born in 1929, purred to his golden statuette at the 2012 Oscars ceremony. "Where have you been all my life?"

One of his last major roles was as in the dark comedy Knives Out in 2019.

Plummer appeared in more than 100 films and also was nominated for an Oscar for his portrayal of Russian author Leo Tolstoy in 2009's The Last Station. He won two Tony Awards for his Broadway work, two Emmy Awards for TV work and performed for some of the world's top theatre companies.

But for many fans, his career was defined by his performance as an stern widower in The Sound of Music - a role he called "a cardboard figure, humourless and one-dimensional". In his 2008 autobiography In Spite Of Myself, Plummer refers to the movie with the mischievous acronym S&M.

It took him four decades to change his view of the film and embrace it as a "terrific movie" that made him proud.

Director Robert Wise's sentimental film follows the singing von Trapp family and their 1938 escape from the Nazis after Plummer's "captain with seven children" falls in love with the aspiring nun played by Andrews. The movie won the Academy Award as best picture of 1965.

"Originally I had accepted Robert Wise's offer simply because I wanted to find out what it was like to be in a musical comedy," Plummer wrote in his book. "I had a secret plan to one day turn Cyrano de Bergerac into a Broadway musical. S&M would therefore be a perfect workout in preparation for such an event."

He said he had never sung before taking a role that included crooning the song Edelweiss. He blamed his own "vulgar streak" for the desire to star in a big, splashy Hollywood extravaganza.

"And yes, all right, I'll admit it, I was also a pampered, arrogant, young bastard, spoiled by too many great theatre roles," he wrote. "Ludicrous though it may seem, I still harboured the old-fashioned stage actor's snobbism toward movie-making."

Plummer's late-career renaissance began with director Michael Mann's The Insider (1999) in which he portrayed CBS News interviewer Mike Wallace, acting alongside Al Pacino and Russell Crowe.

That was followed by Academy Award best picture winner A Beautiful Mind (2001), Inside Man (2006), Up and The Imaginarium of Doctor Parnassus (both 2009) and Barrymore and The Girl with the Dragon Tattoo (both 2011).

Plummer was born in Toronto on Decemberf 13, 1929, into a privileged railroad family. He was the great-grandson of Sir John Abbott, the third prime minister of Canada.

Plummer confessed to a boozy lifestyle with plenty of affairs through the 1960s. He said his third wife, British actor Elaine Taylor, forced him after their 1970 marriage to stop the carousing that consumed some of his peers and friends, such as Richard Burton and Peter O'Toole.

Plummer's early films included 1965's Inside Daisy Clover with Natalie Wood and Robert Redford, released the same year as The Sound of Music, The Fall of the Roman Empire (1964) with Sophia Loren and Alec Guinness, and Triple Cross (1966).

His TV roles included the 1983 miniseries The Thorn Birds.

Plummer was the father of Tony Award-winning actor Amanda Plummer.

Australian Associated Press